District Superintendent Pat Deklotz told WISN 12 News there was a K-9 sweep of the building Thursday night and nothing was found, and the building is safe.

She told WISN 12 News that classes were canceled classes as a precaution.

After-school activities on Wednesday were also canceled at both schools.

"When I got home, I received a call from the school district, and they said that there was a bomb threat but there wasn't anyone in danger, but they wanted to make sure nothing was going to happen, so they said don't go to school," Kettle Moraine High School junior Travis Loepfe said.

Loepfe said a similar threat happened about the same time last year, close to end-of-semester finals.

Deklotz said administrators don't believe the threat is credible, but they are investigating. Deklotz said the threat was found somewhere inside the high school.

The threat specifically mentioned Thursday, and because Wales Elementary School shares the same campus, Deklotz decided to cancel classes there as well.

"We do believe that it is not a credible threat, but we have not finished with the investigation because it was specific to the building and a date, so we are taking precautionary measures, and we want to ensure the safety of all people, staff, students, etc.," Deklotz said.